/* DHTML-Bibliothek */

var DHTML = false, DOM = false, MSIE4 = false, NS4 = false, OP = false;

if (document.getElementById) {
    DHTML = true;
    DOM = true;
} else {
    if (document.all) {
        DHTML = true;
        MSIE4 = true;
    } else {
        if (document.layers) {
            DHTML = true;
            NS4 = true;
        }
    }
}
if (window.opera) {
    OP = true;
}

function getElement (Mode, Identifier, ElementNumber)
{
    var Element, ElementList;
    if (DOM) {
        if (Mode.toLowerCase() == 'id') {
            Element = document.getElementById(Identifier);
            if (!Element) {
                Element = false;
            }
            return Element;
        }
        if (Mode.toLowerCase() == 'name') {
            ElementList = document.getElementsByName(Identifier);
            Element = ElementList[ElementNumber];
            if (!Element) {
                Element = false;
            }
            return Element;
        }
        if (Mode.toLowerCase() == 'tagname') {
            ElementList = document.getElementsByTagName(Identifier);
            Element = ElementList[ElementNumber];
            if (!Element) {
                Element = false;
            }
            return Element;
        }
        return false;
    }
    if (MSIE4) {
        if (Mode.toLowerCase() == 'id' || Mode.toLowerCase() == 'name') {
            Element = document.all(Identifier);
            if (!Element) {
                Element = false;
            }
            return Element;
        }
        if (Mode.toLowerCase() == 'tagname') {
            ElementList = document.all.tags(Identifier);
            Element = ElementList[ElementNumber];
            if (!Element) {
                Element = false;
            }
            return Element;
        }
        return false;
    }
    if (NS4) {
        if (Mode.toLowerCase() == 'id' || Mode.toLowerCase() == 'name') {
            Element = document[Identifier];
            if (!Element) {
                Element = document.anchors[Identifier];
            }
            if (!Element) {
                Element = false;
            }
            return Element;
        }
        if (Mode.toLowerCase() == 'layerindex') {
            Element = document.layers[Identifier];
            if (!Element) {
                Element = false;
            }
            return Element;
        }
        return false;
    }
    return false;
}

function getAttribute (Mode, Identifier, ElementNumber, AttributeName)
{
    var Attribute;
    var Element = getElement(Mode, Identifier, ElementNumber);
    if (!Element) {
        return false;
    }
    if (DOM || MSIE4) {
        Attribute = Element.getAttribute(AttributeName);
        return Attribute;
    }
    if (NS4) {
        Attribute = Element[AttributeName]
        if (!Attribute) {
            Attribute = false;
        }
        return Attribute;
    }
    return false;
}

function getContent (Mode, Identifier, ElementNumber)
{
    var Content;
    var Element = getElement(Mode, Identifier, ElementNumber);
    if (!Element) {
        return false;
    }
    if (DOM && Element.firstChild) {
        if (Element.firstChild.nodeType == 3) {
            Content = Element.firstChild.nodeValue;
        } else {
            Content = '';
        }
        return Content;
    }
    if (MSIE4) {
        Content = Element.innerText;
        return Content;
    }
    return false;
}

function setContent (Mode, Identifier, ElementNumber, Text)
{
    var Element = getElement(Mode, Identifier, ElementNumber);
    if (!Element) {
        return false;
    }
    if (DOM && Element.firstChild) {
        Element.firstChild.nodeValue = Text;
        return true;
    }
    if (MSIE4) {
        Element.innerText = Text;
        return true;
    }
    if (NS4) {
        Element.document.open();
        Element.document.write(Text);
        Element.document.close();
        return true;
    }
}